Isaiah is mentioned in Isalm. Read this link.
It means that God begets our spirit.
How else do you imagine that your spirit came into existence?
Genesis 1:26 And God said, Let us make man in our image, after our likeness: and let them have dominion over the fish of the sea, and over the fowl of the air, and over the cattle, and over all the earth, and over every creeping thing that creepeth upon the earth.
What is the image and likeness of God, if not spirit?
The prophet Isa taught God is our Father:
Matthew 23:9 And call no man your father upon the earth: for one is your Father, which is in heaven.
Another question: What is the revelation given to Isa?
2:136 We believe in Allah, and the revelation given to us, and to Abraham, Isma'il, Isaac, Jacob, and the Tribes, and that given to Moses and Jesus, and that given to (all) prophets from their Lord: We make no difference between one and another of them . . .
1- Actually No he wasn't, the people mentioned in the wiki are IbnuKatheer and Al-Kiasa'e, but are no prophets (or Imams or even companions of the prophet), and the second "Kisaei" are known of taking stories from the bible without checking if there was any kind of verification in them anywhere in Islamic scriptures.
2- what do you imagine by "beget" accurately ? as in something getting out of something ? as in a mother giving a child ? like in something developing from something ?
What we say that God way of giving this world is "Allah says be so be it", there's no kind of mechanism that pure existence existed in.
Yes, there's a mechanism of Cause and Effect thereafter where the first cause is the existence that Allah made with no mechanism but his Masheea'ah (willing).
But God begetting thing, is not of our theology.
See the first sentence, I gave you 3 ways of interpreting "beget" and its mechanism (I am not sure if you imagine one of them or else, but I will tell you why these are wrong) :
1- it is something getting out of something, then allah must have an XYZ(and t) and the thing getting out of it have one, this would have to make us prove two thing we MUST deny : 1- Allah got a place which means Allah is under the meaning of place, then we must ask what was first Allah or the place Allah is in ? and who made the place ? 2- that this world have an XYZT but Quran says that this universe expands : And the universe [sky] We constructed with strength, and indeed, We are [its] expander.
2- that it is a beget like a mother giving a child, this would mean that God have this meaning with that mom and that God have the same pain that the mother have, which is wrong.
3- if it is developing from him, then we have two bad conclusions first God is something at a time and something else at another time the other is that creatures are now developing with God means they are a part from god which is not right.
3- there's a Hadeeth: Muhammad PBUH&H said when someone hit someone on his face "O' Man don't hit your brother because Allah created Adam image as his" and you can see how ambiguous this Hadeeth (is his about the person being hit, or about Allah), and the meaning is also somewhat in Quran it says "Then He proportioned him and breathed into him from His [created] soul and made for you hearing and vision and hearts; little are you grateful."
and most Muslims (but Wahhabis) say that the "image" and "soul" + Allah is a way to honor those two (there's a metaphor style in arabic where you add something to Allah to mean it is honorable, like when we say about Kaaba House of Allah, but it doesn't mean it is REALLY house of Allah ! but it means that the house is honorable )
Like in story of prophet Salih he said to Thamud (in Quran) : There has come to you clear evidence from your Lord. This is the she-camel of Allah [sent] to you as a sign. So leave her to eat within Allah 's land and do not touch her with harm.
that doesn't mean that the camel is really of Allah ! it just mean it is honorable.
thats why you see that the reason of honor is given thereafter, in Quran about soul it said "made for you hearing and vision and hearts" which are some of the powers seized under soul.
and also the camel , same thing.
So it is not likeness of Allah.
4- Revelations are three types in Islamic Philosophy :
- One : Revelation given to ordinary human (thoughts and such) which human get to using tools that god gave them ..... brain and this revelation is also from god under law of "degree between two degrees"
- Two : Revelation given to righteous people, which is a revelation when they get to a certain degree of Mysticism where They see anything but god as a revelation and have the ability to be given some of the news of future and news of existence, and these news are not as affirmative as given to prophets and Imams because as you can see that degree of worshiping is not one. Some prophets needed to get to that degree and then became prophets. this revelation is "mental" - the arabic terminology is more accurate -. And prophets, Imams and righteous people are part of this type.
- Three : Revelation as in the verse you quoted is a revelation of talking (not mental) where God speaks to a human being, and this kind is for messengers of Allah (the first messenger is Noah and the last is Muhammad, Jesus is a messenger), and its mechanism differs from one prophets to the other, while Moses was talked to by a the tree in Sina'a (in the sacred valley Tuwa) for some days, Gabriel came to Muhammad for years for his message. also this is an affirmative message and it starts a Sharia (way of worship) with it that changes the one before it, just like Jesus changed the Sharia of Judah before him, and like Muhammad changed the Sharia of Abraham and Jesus before him. and there's no Sharia thereafter, which makes sense.
Sorry for long answer...